Clam-shell bucket.



E. RATHERTON.

GLAM SHELL BUGKET.. APPLICATION FILED APR. 21.1908.

Patented Apr. 6, 1909.

2 SHEETS-SHEET 1.

D. c. n: Nomus PETERS E0.,\WASHINGTON,

E. F. ATHERTON.

GLAM SHELL BUCKET.

APPLIOATIOE rum) APR. 21.1908.

Patented Apr. 6,1909.

2 SHEETS-SHEET 2.

1% m use:

THE NORRIS PETERS cm, wasmnanm, m c,

EDMOND F. ATI-IERTON, OF CLEVELAND, OHIO.

GLADE-SHELL BUCKET.

Specification of Letters Patent.

Application filed. April 21, 1908.

Patented April 6, 1909.

Serial No. 428,40

To all whom it may concern:

Be it known that l, EDMOND F. Arianawon, a citizen or the United States, and resident of Cleveland, in the county of Guyahoga and State of Ohio, have invented certain new and useful improvements in Clam- Shell Buckets, of which I hereby declare the following to be a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

The objects of the invention are to provide means for obtaining an increased power in the closing means for a clam shell bucket in which two scoop members are drawn forcibly together through the material to be raised in order to inclose the load.

Further objects are to pro -ride forms of mechanism for operating the bucket in which the strains upon a single rope which is employed to close the scoop members together are equalized as well as increased, so that all portions of the rope pull alike and no danger of breakage of the rope is incurred.

The invention is further designed to include as few parts as possible and to be simple and inexpensive in construction as well as ei'iicient in use.

The bucket relates to that class in which the scoop members are provided with at their inner edges, which are pivoted together upon a common axial or bucket shaft, and in which the outer edges of the buclr are supported by means of bail arms, pi

oted together by means of a pin or shalt at their upper ends on the center line of the buckets, and in which the holding and overhauling rope is attached to the pivotal pin of the bail arms, and the power for closing the scoop members of the bucket together is obtained by means or a main oruin mounted upon the bucket shaft, a rope wound thereover, and two closing ropes wound upon smaller drums extended laterally from said main drum and having separate purchase points upon the bail arms or pivot pin there for. In this device however, in lieu of the two minor drums and two closing ropes thereon, only one minor drum is employed and only one closing rope thereon in addition to the main drum and operating rope therefor and the closing rope upon the minor drum, by means or" which increased power is obtained, is carried over pulleys upon the bail pin, or relatively stable portion of the device, and thence over an idler mounted upon the bucket shaft or the opposite side of the main drum, and pre 'erably terminating in a dead end or purchase point at or in the vicinity of the bail pin. in this manner one lrum and rope can be dispensed with and. an enormous gain in power obtained, and the greatest advantage is obtained in the prevention of unequal strains upon the rope which constantly occurred when two ropes and drums were employed, since any irregularity in Winding of one rope upon its drum would make the ropes pull unevenly and break one 0]. them.

The invention further comprises the pe culiar forms of construction of the bail frame and the combination and arrangement of parts as hereinafter described, illustrated in the accompanying drawings and specifically pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of the bucket showing the scoop members closed; Fig. 2 is an edge elevation of the same; Fig. 3 is side elevation showing the scoop members widely opened in the position for receiving its load; Fig. l is a transverse section of the bail pin and bail frame, showing guide and power pulleys.

In these views 1, l are the scoop members of the bucket provided with arms 2, 2 attached to their inner edges. These arms are pivoted upon the bucket shaft 3, and the scoop members are pivoted at their outer edges to arms 4, 4, pivoted together at their upper ends by means or the bail pin 5. The holding rope (S is attached to the pin 63 mounted on the bail l3, passed over the bail pin 5. Upon the bucket shaft 3 is shown the main drum 7, upon which is wound the rope 8 by means of which the scoop mem-- bers are manipulated and it also passes over a guide pulley 9 on the plate 10 above. At one side of this main drum and secured thereto or integral therewith is shown the minor drum 11 upon which the closing rope 12 is wound, which preferably has a dead end 13 thereon or on the side of the larger drum.

The closing rope after passing over the closing drum, passes thence over the pulleys 14:, let pivoted at 15, 15 upon the pendent frame or support which is in turn pivoted upon the bail pin 5 so as to swing freely thereon. These pulleys 14-, 14: carry the rope 12 over the main drum and from these pulleys the rope 12 passes over an idler 16 mounted independently upon the bucket shaft 3, or on a sleeved extension from the main drum, so as to turn freely thereon, and from thence passes preferably to a dead point 17 upon the frame above. The pendent frame will accommodate itself to the swing of the bucket.

It will readily be observed that by pulling on the operating rope 8 the main drum will be revolved and by this means the closing rope 12 will be wound upon the smaller drum which is to be one third of the diameter of the large drum in size. To this increase in power is added the doubling of the rope about the pulleys 14:, 1e and the second doubling about the idler 16, thus providing a closing power of approximately nine to one. Added power could be given by increasing the number of the pulleys without departing from the spirit of the invention, the leading feature of which is the increased power obtainable from the use of a single closing rope, and the free training obtained thereby by the use of the idler on the shaft in lieu of a second closing drum and second closing rope.

The pendent frame or support 20 upon which the pulleys 14E, 14L and guide pulley 9 are mounted is a simple structure composed of a plate bent to form parallel sides and looped over the bail pin. The bail B is shown to be a smaller plate with the sides bent upward and provided with a bail pin 6. The guide roller 9 is mounted in a similar plate 10 riveted to the side of the frame and the pulley is permitted to move freely from side to side on its pivot pin 21 as the rope winds upon the drum so that the winding will be regular thereon.

The number of the pulleys by means of which the closing rope obtains a purchase in the saddle may be reduced or increased, and the relative sizes of the drums altered, without departing from the spirit of the invention.

Having described the invention what I claim as new and desire to secure by Letters Patent is 1. In a clam shell bucket, provided with scoop members pivoted together at their inner edges and with bail arms pivoted to their outer edges and pivoted together at their upper ends, a frame on said bail shaft, a bucket shaft, upon which said scoop members pivot, a main drum and a minor drum, at one side thereof, said drums secured to gether and mounted on said bucket shaft, a

closing rope upon said minor drum, a pulley upon said frame over which said closing rope passes, an idler on the bucket shaft over which said closing rope passes, and a purchase point upon the said frame for said closing rope.

2. In a clam shell bucket provided with. scoop portions, a common bucket shaft on which the inner ends of said scoop portions are pivoted, and bail arms pivoted together attheir upper ends and to the outer edges of the scoop portions at their outer edges, the combination therewith of a large drum upon the bucket shaft, a smaller drum secured to said large drum at one side thereof an idler" upon said bucket shaft, a frame overhead pulleys upon the'said frame, a holding rope upon said frame, an operating rope passing around said large drum, a closing rope pass ing around said smaller drum, said closing rope passing over said overhead pulleys and over said idler and having a purchasepoint in said frame, substantially as described.

3. In a clam shell bucket, the combination with scoop portions pivoted together at their inner edges, of a common pivotal drum shaft therefor, bail arms pivoted together at their upper edges, and at their lower edges pivoted to the outer edges of said scoop portions, a frame upon the upper bail arm pivot, a large and a small drum secured together and pivoted upon said drum shaft and a closing means for said scoop portionscomprising a single closing rope passing over said smaller drum and having purchase points upon said frame and upon the said bucket shaft on the other sideof said large drum, an equalizing means for said closing rope, and an operating rope passing over said large drum. v

4. In a clam shell bucket, in combination, with a pair of scoop members pivoted together at their inner and upper edges, a common pivot shaft therefor, and hail arms pivoted to said scoop members at their outer edges and a bail arm shaft pivotally connecting the upper ends of said bail arms, a pulley support on said bail shaft, and a closing means for said scoop portions comprising, an operating drum upon the common pivot shaft for the scoop members, a smaller closing drum on said operating drum, elevated pulleys on the said pulley support and a loose pulley on the said common pivotal shaft located on the opposite side of the operating drum from the winding drum, a single closing rope passing over said closin drui'n, elevated pulleys and loose pulley ant having a final purchase in said pulley support, an operating rope upon said operating drum, and means for holding said bucket.

5. In a bucket frame, in combination, a bail arm shaft, a saddle thereon, and a bail on said shaft, the said saddle being cut away to provide an opening for said bail, said the depend.in. sides of said bent alate and a A O 7 saddle sewing as a pulley support.

:"uide pulley vsecured for limited lateral In a bucket having scoop sections pivmovement upon one side of said frame. oted together and hail arms supporting the In testimony whereof I hereunto set my 5 same a bail arm shaft pivotally connecting hand this 18th day of April 1908.

s n d bail arnrs, a saddle upon JiSEllCl hail arm EDMQND F. ATHERTON smut comprising a SHGQb Oi metal bent around the shaft and provided With a cenin presence of tral opening, a bail upon said shaft, located GEO. S. COLE,

10 in said opening and pulleys pivoted between WM. M. MONROE. 

